Hinguleshwar Ras: Traditional Uses, Evidence & Safety
TL;DR
Hinguleshwar Ras is a classical Rasa Shastra tablet: purified cinnabar (mercury sulphide), aconite (Visha), and long pepper in equal parts, ground into ~125 mg pills for Vata-type fever. Two of three ingredients are poisons: mercury and aconite. A zebrafish study found processed α-HgS less toxic than commercial cinnabar. Still mercury. No human trial exists. This is practitioner-only, short-course, never self-medication.
What it is
Hinguleshwar Ras (Hinguleshvara Rasa) is a classical herbo-mineral formulation referenced in the Bhaishajya Ratnavali and Ayurveda Sara Sangraha. Its composition is stark:
- Shuddha Hingula: purified cinnabar, i.e., mercury sulphide (HgS), red mercuric sulphide mineral
- Shuddha Visha: purified Aconitum ferox (Indian aconite/bachnag), one of the most toxic plants in the Ayurvedic materia medica
- Pippali: long pepper fruit (Piper longum)
Equal parts are ground in a mortar with sufficient water (tulyāṃśaṃ mardayet khalve pippalīṃ hiṃgulaṃ viṣam) and formed into pills of about 125 mg, dried in shade (Ayurmedinfo; Planet Ayurveda).
The classical dose is half a gunja (roughly 60 mg) with honey, for Vata fever (guñjardhaṃ madhunā deyaṃ vātajvaranivṛttaye).
Traditional use
The batch data records Hinguleshwar Ras as pungent-bitter, heating (Ushna virya), with Jwaraghna (antipyretic), Vedanasthapana (analgesic), and Vatahara prabhava. The primary classical indication is Vataja jwara (fever with Vata predominance); practitioner literature extends it to chronic fever, headache, body ache, joint pain, and inflammatory Vata disorders (Planet Ayurveda).
The formulation logic: aconite is the classical antipyretic-analgesic (in micro-doses, after detoxification), cinnabar the mineral rasayana/alterative, long pepper the bioenhancer and digestive.
I record the classical claims faithfully above. Below, I check them against research, separately.
What modern research says
Mercury toxicokinetics (zebrafish study)
The closest modern science to this formula's mercury component: a Chemosphere study compared Ayurvedically processed α-HgS (Rasasindura) with commercial mercury sulphide and raw cinnabar ore in zebrafish, at 100 mg/kg/day for 10 days. The Ayurvedic preparation had the smallest crystallite size (26 nm), showed no significant behavioral toxicity, and caused no significant brain glutathione depletion, while commercial and raw forms did both (PubMed 32143074).
Read carefully: this shows the traditional processing changes the material's toxicokinetics. It does not show mercury is safe. It is a zebrafish study of a different preparation (Rasasindura, not Hinguleshwar Ras), and aconite, the other poison in this formula, was not in it.
What the evidence does not support (yet)
No human trial of Hinguleshwar Ras was identified, not for fever, pain, or any other indication. No clinical safety study exists. The traditional antipyretic claims are untested in modern research.
Safety & contraindications
This section is the article. Read it fully.
- Mercury. Cinnabar is mercury sulphide. Purification and processing change its behavior but do not remove the mercury. Chronic mercury exposure damages kidneys and the nervous system. Only products from licensed manufacturers, used short-course under qualified supervision, have any standing.
- Aconite. Aconitum ferox contains aconitine alkaloids that are cardiotoxic and neurotoxic; the margin between the traditional dose and poisoning is narrow. Improperly detoxified aconite can cause fatal arrhythmia.
- Never in pregnancy, breastfeeding, or childhood. Never with kidney or liver disease, cardiac arrhythmia, or neurological disease.
- No self-preparation, no self-dosing. The ingredients cannot be safely handled or dosed at home. The classical texts themselves restrict such formulas to expert preparation.
- Fever that persists, spikes high, or comes with warning signs (rash, stiff neck, confusion, breathing difficulty) needs urgent medical care, not a herbo-mineral pill.
FAQs
What is Hinguleshwar Ras?
A classical Ayurvedic tablet of purified cinnabar (mercury sulphide), purified aconite, and long pepper in equal parts, traditionally used in ~60 mg doses with honey for Vata-type fever (Ayurmedinfo).
Is it safe?
It contains mercury and aconite, two of the most toxic substances in the traditional materia medica. "Safe" applies only to properly prepared products from licensed manufacturers, used short-course under qualified supervision. There are no human safety studies.
Does modern science support its use for fever?
No. A zebrafish study suggests Ayurvedic mercury-sulphide processing reduces toxicity versus raw cinnabar (PubMed), but no trial has tested Hinguleshwar Ras for fever in people.
Can I make it at home or buy the raw ingredients?
No. Cinnabar and aconite cannot be safely purified, dosed, or handled outside expert pharmaceutical practice. Do not attempt this.
Why is there no dosage section in this article?
Our editorial rule is to state doses only with a pharmacopoeial monograph or clinical-trial citation. The classical half-gunja dose is reported above as textual data. Given the mercury and aconite content, publishing a "how to take it" section would be irresponsible; dosing is exclusively a qualified practitioner's decision.
Sources
The composition (equal parts Shuddha Hingula, Visha/*Aconitum ferox*, Pippali; water-ground; ~125 mg pills; half-gunja dose with honey for Vata jwara; Bhaishajya Ratnavali reference) is the Ayurmedinfo monograph (page) and Planet Ayurveda (page). The mercury toxicokinetics findings (Ayurvedic α-HgS: 26 nm crystallites, no significant behavioral toxicity or brain GSH depletion in zebrafish vs. commercial/raw forms) are the Chemosphere study (PubMed 32143074). The Hingula mineral review (cinnabar chemistry, classical types) is the IJBPSA appraisal (PDF).
Related herbs
- [Vatsanabha (Aconite)](/learn/herbs/vatsanabha)
- [Pippali](/learn/herbs/pippali)
- [Gandhaka](/learn/herbs/gandhaka)
- [Tamra Bhasma](/learn/herbs/tamra-bhasma)
Disclaimer
This article is for educational purposes only and is not medical advice. Hinguleshwar Ras contains mercury (as cinnabar) and aconite — both documented poisons. Do not obtain, prepare, or self-administer it in any form. Use purified preparations only under a qualified practitioner for the prescribed duration, and never in pregnancy, breastfeeding, childhood, kidney or liver disease, or cardiac conditions. Persistent or severe fever needs urgent medical care.